The City Council may amend, supplement, modify or repeal the regulations and boundaries as provided in this chapter.

A public hearing shall be held by the Board of Appeals before adoption of any amendment, supplement or change by the City Council. Public Notice of such public hearing shall be placed in a newspaper of general circulation within the community not more than 30 days nor less than 15 days before the hearing.

In case of written protests against any proposed amendment of the regulations or districts, signed and acknowledged by the owners of 20% of the frontage proposed to be altered, or by the owners of 20% of the frontage directly opposite of that to be altered, such protests shall be filed with the City Clerk and the amendment shall not be passed except by a favorable vote of two thirds of the City Council.

In order to partially defray the expenses of a zoning change public hearing, each applicant petitioning for a zoning change shall deposit with the City Clerk the sum of $35 dollars. No part of such amount shall be refunded for failure of the amendment to be enacted into law. Additionally, the applicant shall pay the actual cost of publication before the hearing.

No amendment shall become effective unless it is first submitted to and approved by the Zoning Board of Appeals, or if disapproved, shall receive a two thirds majority vote of the entire City Council.

The City Council shall cause to be published no later than March 31 of each year, a map clearly showing the existing zoning districts and classifications. If in any calendar year there are no changes in zoning divisions, no map shall be published for such calendar year.